Fluid-operated chair.



PATBNTED Nov. i0, 1903.

A. N. HORNUNG, JR.' FLUID OPBRATEDUHAIR. VAPfLIOATION' FILED APR. 8;1901.

I0 MODEL.

2 $HEBTS-SHBET l.

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PATENTBD Nov. 1o, 1790's.

l A. N. BOWLING, JR. FLUID OPERATED CHAIR. 'APPLICATION FILED APB.; a.1901.' l

UNITED i STATES-A Patented November 10, 1903.

PATENT` OFFICE.

ANTON N. HORNNG, JR., OF CHICAGO, ILLINOIS, ASSIGNOR TO LOUIS HANSON, OFCHICAGO, ILLINOIS.

FLUID-OPERATED CHAIR.

SPECIFICATION forming part of Letters I Patentlflo. 743,508, datedNovember 10, 1903.

i Application led April 8 1901.

To aZZ whom it may concern:

Be it known that I, ANTONN. HoRNNe,

J r., a citizen of the United Statesresiding at ble construction and onein which the rais-l ing and lowering of the chair may be accomf plishedby one and the same movement of an operating treadle or lever.

With these ends in view my invention consists in certain features ofnovelty in the construction, combination, and arrangement of parts bywhich the said objects and certain other objects hereinafter appearingare at-` tained, all as fully described with reference to theaccompanying drawings'and more par' ticularly pointed out in the claims.

In the said drawings, Figure 1 is averticai sectional view of the baseof myimproved chair, showing the chair-standard provided with a part ofthe superstructure. Fig. 2 is a detail View of the guide-cylinder andpump with connected parts looking at right angles to the view presentedin Fig. 1. Fig. 3 is a detail plan view of the pump-casting. Fig.

4c is a vertical sectional view of the base,

guide-cylinder, and turret-head with connected parts. Fig. 5 is anenlarged Vertical sectional view of the pump hereinafter de` scribed.

The chair-base is formed with a foot-piece 1, as usual, and with a basechamber or basin 2, which may be cast integrally therewith and providedwith a filling-aperture 3,where by the basin or chamber 2 may be.supplied with Water, oil, or other liquid for elevating thechair-standard, as hereinafter described, and upon this chamber 2 issupported a casing e, which constitutes a support for the Serial No.54,833. (No model.)

resting upon the upper end thereof. The guide-clyinder 5 extendsdownwardly to near thebottom of the basin 2, and to its lower end isbolted orsecured a pum p-casting. (Better shownin Fig. 3.) This castingis formed on one side with a pump-barrel 7, which has an open end 8communicating directly with the chamber or basin 2,while its oppositeend has an outlet 9 communicating by horizontal duct or passage 10 in aright-angle branch pipe 10 with the lower end of the guidecylinder.Within the barrel 7 is arranged a pump-plunger 11, provided with anaperture 12, adapted to permit the liquid entering the open end 8 of thebarrel to pass through to the outlet 9 when the plunger moves in onedirection. When the plunger moves in the opposite direction, however,`this aperture 12 is closed by a check-valve 13, located in suitablecage 14. The rear end of the plunger is formed with a cup-shapedextension 15,whicl1 serves as a guide and constitutes means wherebytheplunger may be connected to the lower end 16 of an operating lever ortreadle, whose outer end 17 is curved upwardly over the upper edge ofthe basin 2 and passes through afslot 18 in the casing 4, the lever 1617 having a lug 19, by means of which it is pivoted to a boss 2O on theexterior of guide-cylinder 15. The rear cup-shaped extension 15 of theplunger is connected by a spider 21to ears 22, which are provided with across-pin 23, engaging in a slot 24 in the lower end 16 of theoperating-lever, said lower end being extended into the open end of thepump-barrel, as clearly shown in Fig. 5. The plunger 11 is forced'towardthe outlet 9 by downward pressure upon the lever end 17, and it isreturned to its former position by means of a spring or other suitabledevice 25, secured at one end to the lever-lug and at its upper end to ahook or lug 26 on the under side of the flange 6. This upward movementof the outer end 17 of` the lever retracts the plunger and causes ,theliquid in the chamber or basin 2 to pass through thepump-barrel,unseating the check- 'ivalve 13 and entering the barrel atthe leftzhand sideof the pump-plunger as viewed in Fig. 5. The downwardmovement of the lever forces the liquid through the pump-barrel Aguide-cylinder 5, having allateral flange 6 IOO outlet 9 into the duct10 in the right-angle branch pipe 10a and thence into the lower end ofthe cylinder 5, thus causing the piston 27 on the lower end of thechair-standard 28, which is inserted in the guide-cylinder 5, to rise.Theguide-standard and piston are held at the desired elevation afterbeing lifted by the water in the cylinder 5 by means of any suitablelocking mechanism preferably operated in unison with the pump-plunger,so that as the pump-plunger is advanced for forcing thc liquid into thecylinder 5 the lock will disengage the standard 28 and permit the liquidto lift the standard, and when the plunger recedes the lock will engagesaid standard and hold it from downward movement. This locking mechanismpreferably consists of a pin or dog 29, pivoted to a lever 30, which inturn is pivoted to an ear 3l on the outer side of the cylinder the dog29 being normally projected through the side ofthe cylinder 5 intoengagement with one of a series of sockets 32, formed in the side of thestandard 28. Any

j suitable means may be employed forthus holdingthedog29inengagement.Inthedrawings I have shown a spring 33 wound around the pivot 31 andforcing outwardly against the lower end of lever 30. The dog 29 isretracted for releasing the standard 28 simultaneously with the downwardmovement of the end 17 of the operating-lever by means of a cam o'rwedge frame 34, which is open, so as to tit on both sides of the dog 29and ear 31, and has its incline or wedge engaging between the side ofcylinder 5 and a cross-pin 35, projecting from the sides of the upperend of lever 30, the lower end the wedgeframe 34 being pivoted at 36 tothe operatinglever 16 17.

The liquid is prevented from receding from the cylinder 5 by means of acheck-valve 37, located at any suitable point between said cylinder andthe discharge side of the pump. In the example of the invention shown inthe drawings said check-valve is located in a housing formed by anextension 38 on one end of the pump-barrel 7 and a screw-cap 39, closingsaid extension, the seat for the checkvalve 37 being constituted by aweb or perforated diaphragm 40, through which passes the valve-stem 41,having a head 42, between which latter and the diaphragm 40 bears acoil-spring 43, which is sleeved on the stem 41 and tends to hold thevalve closed.

At a point between the extension 38 and the main portion of thepump-barrel 7 said pump-barrel is provided with an enlargement 44, whichconstitutes a by-pass around the plunger 11 when the latter is projectedinto said enlargement, and thus establishes free communication betweenthe cylinder 5 via 9 and 10 when the check -valve 37 is opened, therebypermitting the liquid in cylinder 5 to recede through the pump-barrelinto the chamber or basin 2, thus allowing the chair-standard to descendwith a velocity dependent upon the freedom with which said liquid isallowed, to escape. In order that the liquid may pass the plunger 11when projected in the manner shown in Fig. 5, the guide extension 15 ofthe plunger is provided with a peripheral groove 45 and a series ofapertures 46 at suitable intervals apart in said groove.

When the foot-lever 17 is depressed within certain limits, so that theplunger 11 does not project into the enlargement 44 of the pump-barrel,the chair-standard will be elevated, as already described; but shouldthe lever be depressed beyond such limit, so as to project the plungerinto the position shown in Fig. 5, the plunger will strike the inner endof the valve-stem 41 and force the valve 37 from its seat and hold itunseated while the liquid recedes from cylinder 5 back into chamber orbasin 2 via the passages 10 9 45 46 and the inlet end 8 of barrel 7, thelocking-dog 29 being at the same time held out of engagement by thewedge-bar 34 engaging behind the pin or lug 35.

Having thus described my invention, what l claim as new, and desire tosecure by Letters Patent, is

1. In a device for the purpose described the combination with a cylinderand a piston therein, of a pump connected with said cylinder, means foroperating said pump, a locking-dog for holding said piston and a wedgeor incline member connected with said pumpoperating means, for releasingsaid dog, substantially as set forth.

2. In a device for the purpose described the combination with a cylinderand a piston therein, of a horizontally-arranged pump, a basin in whichsaid pump is wholly located, a pump-operating lever passing over theedge of and curved downwardly into said basin and having alaterally-extending arm connected with said pump and a lug pivoted t0the cylinder, and a spring connected with the cylinder for returning thelever, substantially as set forth.

3. In a device for the purpose described the combination of a cylinderhaving an ear, a piston having a series of sockets and working in thecylinder, a basin, a pump-barrel wholly located in the basin, a branchpipe connecting the pump-barrel with the cylinder and located under thelatter, a plunger, an operating-lever connected with the plunger, aspringlever having a pivoted dog adapted to be projected through thecylinder into engagement with one of the sockets and pivoted to the earof the cylinder, and a cam connected with the operating-lever andworking between the spring-lever and the cylinder.

4. VIn a device for the purpose described, the combination of a basin, acasing supported on the basin, a guide-cylinder supported by the casing,a standard located within the guide-cylinder and carrying a piston, apump-casting located in the basin and formed on one side with apump-barrel having an open end, an enlargement, an exten- ICO IIO

aperture, a cage secured to the plunger, a to check-valve located withinthe cage, a cupshaped extension to the plunger, having a perforatedgroove and a spider, and an operating-lever connected with the spider.

ANTON N. HORNUNG, JR. Witnesses: Y

F. A. HOPKINS, EDNA B. JOHNSON. i

